. >>> coming up next, talking to first woman ever to moderate a presidential debate. her thoughts on president obama and mitt romney's big showdown tomorrow night, denver, colorado, carole simpson, such a pleasure, such an honor. she'll join me live next. >>> well, we went deep into the vault for this one here at cnn. the date was october 15th, 1992, presidential debate nearly 20 years ago, to the day. remember this? >> the candidates are the republican nominee president george bush, the independent russ perot, and governor bill clinton, the democratic nominee. my name is carole simpson. and i will be the moderator for tonight's 90-minute debate. >> 90-minute debate, she says. that is carole simpson then. and here is carole simpson today. once again, the lady in red. carole simpson, amazing seeing you here, 20 years later, welcome. you know, all kinds of history made that night. you and i were talking on the commercial break, people recognizing you all around the world in the 20 years since. and it was unique about that night, the three debaters, not the usual two, yo